When giving is good: ventromedial prefrontal cortex activation for others' intentions

Area of Science:

• Neuroscience
• Social Psychology
• Decision Science

Background:

• Social decision-making involves evaluating both outcomes and intentions.
• Neural mechanisms integrating intentions and outcomes remain unclear.

Purpose of the Study:

• To investigate how the brain integrates representations of others' intentions with their outcomes during social decision-making.
• To examine neural correlates of inferring generosity versus selfishness based on framing.

Main Methods:

• Functional magnetic resonance imaging (fMRI) was used to monitor brain activity.
• Participants inferred decisions in an economic game framed as donations or savings.
• Medial prefrontal cortex (mPFC) and temporoparietal junction (TPJ) activation patterns were analyzed.

Main Results:

• Ventromedial prefrontal cortex (VMPFC) activation differentiated generous from selfish play in the donation frame but not the savings frame.
• Distinct mPFC regions encoded norm consistency.
• The right temporoparietal junction (rTPJ) and parahippocampal gyrus showed greater activation for inferential errors in the donation condition.

Conclusions:

• Neural responses to perceived generosity or selfishness are influenced by both actions and inferred intentions.
• The framing of social decisions impacts neural processing of intentions.
• The VMPFC plays a role in evaluating intentions within specific social contexts.